120 



fishtail tip. Points in squares LZ2 are for a slotted lava tip or bat-wing 

 burner. Points in circle © are for Argand burner No. 1. 



In Fig. II are the mean values reduced to a standard basis, namely, 

 13.6 cubic feet gas, the mean values of the gas throughout the experi- 



IX 



10 



L 



/h-f t 



ments as shown by the standard fishtail burner. Burner No. I was a 

 commercial burner, with the air supply almost all cul off from the out- 

 side of the cylindrical flame. Burner No. II was a commercial, with the 

 holes dosed with copper plugs, or 18 holes open. Burner No. Ill had one- 



